on these two classrooms with devastating effect. the detail that was so shocking is that he used an assault style weapon, a bushmaster .223, the same weapon that the washington snipers used ten years ago and shot these children several times, sometimes as much as 11, 12 times. >> the shooter adam lanza who took his own life. we have an older picture of him, it's the only picture that exists. what more do you know about him? >> this is a young man who had a mild form of autism and was always a person apart, never had any close friends, never seemed to be a good fit anywhere, his mother took him in and out of school, homeschooled him for a while. his parents got divorced, he stayed with his mother but obviously the friends of his mother, neighbors say there was a great strain there. unlike other kids who had backpacks, he always had a briefcase, he had trouble looking people in the eye, he had trouble fitting in or answering questions. so it was a very difficult time for him and his mother. >> i would think in the days and weeks ahead the immediate focus will be on what can be learned from th